Abstract: A novel forward-facing, aft-attached cantilever beam is provided as a latch for securing a fiber optic connector to a receptacle. The beam has engagement structure on its free end which attaches to the receptacle. The connector includes a plug housing formed from a member having a forward end and a rearward end and an axial passageway therethrough through which at least one optical fiber provided in the fiber optic cable extends. The forward end is inserted into the receptacle with the rearward end extending from the receptacle. The cantilevered beam has an end fixed to a rearward portion of the member and its free end extends forwardly toward the forward end of the member. To engage the connector with the receptacle, the free end of the cantilevered beam is biased toward the member and the member is slid into the receptacle. Once fully inserted, the engagement structure on the cantilevered beam engages retention structure in the receptacle.

Abstract: An optical connector system comprises mating first and second fiber ferrules (1, 11). Each ferrule (1, 11) has an endface (4, 14) polished at an angle to minimize backreflections. A holographic optical element (6) disposed on the first ferrule endface (4) receives a transmitted beam and expands the beam to an expanded beam (21) of collimated light. The expanded beam (21) is launched into an air gap (22) for receipt by a holographic optical element (16) disposed on the second ferrule (11). The holographic optical element (16) on the second ferrule (11) receives the expanded beam (21) and focuses it to be received by the fiber held in the second ferrule (11).

Abstract: The present invention presents a method in which semiconductor heterojunction and homojunction materials are selectively formed on silicon pedestals in an HMIC after the high temperature processing steps in fabricating the HMIC structure are completed.

Abstract: A frequency dependent lossy line subcircuit element has a first port (100), a second port (101), and a reference point (102). The lossy line element is configured to represent circuit performance over a band of frequencies. The lossy line element is modeled as a subcircuit comprising a parallel combination network of resistors (11-14), each with an inductor (1-4) in series disposed between the first port (100) and an internal node (103). Inductors (1-4) are proportioned in value relative to each other so as to control the magnitude of the simulated current flow through resistors (11-14) as a function of frequency content of an excitation signal appearing at the first port (100). The subcircuit, therefore, models frequency dependent attenuation for each frequency included in the range.

Abstract: The present invention relates to a heterojunction bipolar transistor structure having a device mesa 401 with a collector region 402, a base region 403 and an emitter region 404. An emitter metal layer 405 is connected to a ballast resistor 406 which in turn is connected to an emitter bump 407 by way of the air bridge 408. The thermal bump 409 is connected to the emitter metallization by way of a layer of heat dissipation material 410, preferably silicon nitride. The present structure enables dissipation of heat at the emitter contact as well as a ballast resistor connected to the emitter by way of metallization 405. This arrangement enables the dissipation of joule heat to avoid higher temperature of operation which results increased current at the collector which increases the temperature thereby further increasing the current, as well as provides a ballast resistor to reduce the collector current back to an acceptable value to avoid thermal runaway.

Abstract: The present invention provides a sealed enclosure which houses fiber optic cable in a manner accepted in the field. The sealed enclosure for a cable includes a floor surface, the floor surface having a discontinuous periphery defining at least one opening in the floor surface, the at least one opening defining a pass through in the floor surface. Upstanding side and back walls extend from the floor surface, and a ceiling surface joins with the side and back walls opposite to the floor surface. At least one door is mounted to a front of the enclosure and against corresponding edges of the floor surface, side walls, and ceiling surface. A sealing assembly is positioned over the at least one opening in the floor surface to seal the enclosure from the external environment upon insertion of the cable within the enclosure.

Abstract: An overmolded alignment ferrule for a fiber optic device used to couple a plurality of optical fibers contained therein to an other fiber optic device. The overmolded alignment ferrule comprises a precision portion for aligning the optical fibers with the other fiber optic device, and an overmolded body portion extending rearward from the precision portion for incorporating the alignment ferrule into the fiber optic device. The precision portion may define a plurality of first guide pin channels for receiving guide pins and a plurality of first fiber channels for receiving the optical fibers. The overmolded body portion may define a plurality of second guide pin channels in communication with the first guide pin channels and at least two second fiber channels. Each second fiber channel is in communication with a respective one of the first fiber channels. In producing the precision portion, the first guide pin channels are desirably used as datum in defining with precision the first fiber channels.

Abstract: A packaged integrated circuit configured for interconnection to an external component comprises a die (1) having a high frequency contact (8), the die (1) being disposed on a lead frame (3). The lead frame (3) comprises a plurality of leads (9). At least two of the leads are first and second RF port leads (9a, 9b) which are electrically connected to the RF port. When mounted to a printed circuit board substrate, there is a capacitor (12) connected between the first and second high frequency contact (8) leads (9a, 9b) to achieve frequency specific signal attenuation at an unwanted frequency with minimal contribution of insertion loss at a desired frequency.

Abstract: A coaxial connector (1) has a resilient cantilever beam (23) extending from a central contact portion (6), a beam engaging surface (33) on insulation material (3) to limit movement by deflection of a first resiliently deflectable portion (24) of the beam (23), a tab electrical terminal (27) at an unsupported end of the beam (23), and the beam (23) being curved back on itself adjacent the tab electrical terminal (27) to provide a second resiliently deflectable portion (26) of the beam (23).

Abstract: An apparatus for assembling a multiple component article such as an optical fiber connector and inspecting assembled multiple component articles. The apparatus includes a fixture or nest for retaining an elongated body of the connector in a selected orientation. Stations of the apparatus are included for placing the elongated body in the fixture in a selected orientation, placing a biasing component on the elongated body, placing a coupling nut on the elongated body over the exposed end and abutting the biasing component, and applying a retaining component to an outside surface of the elongated body for retaining the biasing component between the elongated body and the coupling nut in a compressed state. The inspection system includes a fixture for retaining the multiple component article in a selected orientation in which a portion of the elongated body and a portion of the coupling nut are exposed for inspection.

Abstract: Injection molded insulating strips receive a plurality of contacts. The strips are stacked together to create a multiple row, multiple column contact array. The contact array is adapted for use in an IC socket to separably connect an IC having either an LGA or BGA package lead styles. A cover plate, locator, array frame, and contact array together comprise a manufacturable and low cost separable IC socket.

Abstract: A multiple position fiber optic receptacle comprises a first receptacle member (1) joined to a second receptacle member (3). Captivated within and between the first and second receptacle members (1,3) is a coupling mechanism (17), an alignment sleeve (5), and a floating bottleneck (6). The floating bottleneck (6) permits independent adjustments of each alignment sleeve (5) relative to a ferrule to minimize the insertion force associated with ferrule to alignment sleeve misalignment. In an alternate embodiment, a floating bottleneck is removable permitting repair of the receptacle.

Abstract: An adapter assembly (20) for electrical connection between a small outline integrated circuit (SOIC) (25) and a remote receptacle connector (87) via a cable including a plurality of electrical conductors (23) comprises a nonconductive adapter housing (21) providing a plurality of spaced-apart slots (39) for receiving a plurality of contacts (22). The SOIC (25) being received in a cavity (50) at the bottom of the adapter housing (21), is retained within the cavity (50) by retention teeth (57) engaging respective side retention areas (54) located between each two adjacent leads (24) of the SOIC (25), and by a pair of retention members (55) engaging respective end retention areas (56) of the SOIC (25). A removable clip (26) is locked over the adapter housing (21). Each contact (22) being received in the respective slot (39), engages a respective lead (24) of the SOIC (25) by its lower portion (61). An upper portion (62) of each contact (22) terminates the respective electrical conductor (23).

Abstract: A tubular body for use with an optical fiber connector, and the connector using such a tubular body. The optical fiber connector includes a coupling nut, biasing means and a retaining ring which are axially arranged on the tubular body. The coupling nut and the biasing means are retained externally on the tubular body by the retaining ring with the coupling nut being movable along the outside surface of the body and axially displaced by the biasing means. The body includes a ring attachment portion on the outside surface thereof. The ring attachment portion includes an annular groove and an annular ridge which are formed on the outside surface thereof. The annular groove is sized and dimensioned for receiving a radially applied retaining ring. The outside diameter of the attachment portion on the outside surface of the body is sized and dimensioned for receiving an axially attached retaining ring.

Abstract: A polarized connector comprises a connector body having an opening for receiving a polarization key. The key comprises a polarization member and slotted shaft rotatable in the opening about a longitudinal axis. The slotted shaft permits user access to the key to rotate the key within the opening in the connector. The polarized connectors described herein permits simple polarization changes with a single key element that is retained with the connector for all polarization configurations.

Abstract: An environmentally sealed interconnect system (10) having a male connector housing (20) and a female connector housing (21). A plurality of spaced-apart contact locator ribs (34) and contact mounting ribs (38) are formed in the male connector housing (20) and are received with a force fit in a corresponding plurality of spaced-apart cooperating sealing areas (45), (50) in the female connector housing (21). The ribs (34), (36) and sealing areas (45), (50) form a sealed interconnect system (10). A plurality of spaced-apart interposer contacts (26) are disposed in the interconnect system (10) secured therein by the ribs (34), (35). An O-ring sealant (31) is disposed about the periphery of the interconnect system (10) to provide an outer environmental seal for the interconnect system (10).

Abstract: A removable sensor assembly (10) comprises a removable sensor member (15) to be inserted into the opening (27) of an insulated housing (13) mounted on the surface of a PCB (11) and secured thereon by a pair of the contact members (16, 17). The contact members (16, 17) have respective foot portions (19, 20) which are soldered to contact pads (14) on the PCB (11). The removable sensor member (15) is a piezoelectric film sensor mounted onto a hard drive to detect physical shock and to shut the drive down in order to prevent destruction of data thereon. The opening (27) is a slot angled at 45.degree. to the surface of the PCB (11) to allow a three- axis sensing capability as well as reducing the overall height of the insulated housing (13).

Abstract: An electrical connector for sealably mounting into a frame may be manufactured using known low cost, automated processes. Contact elements are sealingly encircled by and extend through an insulating body having a frame abutting surface. A separate shroud interfits with the body at an unsealed shroud junction. A continuous compressible sealing element disposed on a frame abutting surface circumscribes and sealingly isolates an area interior of the compressible sealing element from an area exterior of the compressible sealing element. The shroud junction is entirely within an area interior of the compressible sealing element.

Abstract: An automated method is disclosed for grinding and polishing the terminated ends of the optical fibers in a fiber optic cable. The abrasive material, in strip form, is moved in a carriage along a linear path while the carriage is oscillated in a circle within a plane during polishing. There are three separate work stations operating concurrently, the first having a relatively course grade of abrasive while the others have finer grades. Fixtures holding the cables for polishing are held in fixture supports that are automatically fed toward the abrasive material during polishing and retracted after polishing is complete. The fixture engagement mechanism for the first carriage engages at a slower rate than do the mechanisms of the other carriages.

Abstract: A strain relief boot (10) in combination with a connector (15). The strain relief boot (10) has a body (11) having a rigid portion (12) and a flexible portion (13). A center bore (14) extends through the body (11) and the connector (15) is slidingly disposed in the center bore (14). The body (11) has an inner wall (20) surrounding the center bore (14). A plurality of spaced-apart ribs (21) are formed on the inner wall (20) of the rigid portion (12). Each rib (21) has a top surface (22) and a pair of adjoining sidewalls (23). The ribs (21) extend inwardly into the center bore (14) and grip the connector (15) with a friction fit, retaining the strain relief boot (10) on the connector (15).